Iowa Dams

4,124 dams tracked by the National Inventory of Dams

Total Dams

4,124

High Hazard

2.2%

Poor / Unsatisfactory

Average Age

46 yrs

Hazard Classification

High91 (2.2%)

Significant274 (6.6%)

Low3,759 (91.1%)

Condition Assessment

Satisfactory259 (6.3%)

Fair81 (2.0%)

Poor / Unsatisfactory25 (0.6%)

Not Rated3,759 (91.1%)

Federal

State

141

Local

1,938

Private

2,014

Tallest Dams

High Hazard Dams

Poor Condition Dams

All Dams in Iowa

Showing 2126–2150 of 3,759

All High Hazard Significant Hazard Low Hazard Poor Fair Satisfactory

Dam Name	Height (ft)	Year	Hazard	Condition
Mill Picayune Watershed Site P-47-2 Shelby County	36	1975	Low	Not Rated
Mill Picayune Watershed Site P-47-3 Shelby County	38	1978	Low	Not Rated
Mill Picayune Watershed Site P-47-4 Shelby County	47	1978	Low	Not Rated
Mill Picayune Watershed Site P-57-1 Shelby County	44	1975	Low	Not Rated
Mill Picayune Watershed Site P-6 Shelby County	45	1985	Low	Not Rated
Mill Picayune Watershed Site P-64-1 Shelby County	48	1986	Low	Not Rated
Mill Picayune Watershed Site P-79-1 Shelby County	46	1964	Low	Not Rated
Mill Picayune Watershed Site P-79-2 Shelby County	50	1986	Low	Not Rated
Mill Picayune Watershed Site P-79-3 Shelby County	33	1993	Low	Not Rated
Mill Picayune Watershed Site P-90-1 Shelby County	53	1984	Low	Not Rated
Mill Picayune Watershed Site P-92-1 Shelby County	51	1984	Low	Not Rated
Mill Picayune Watershed Site S-1 Harrison County	32	1994	Low	Not Rated
Mill Picayune Watershed Site S-10-1 Harrison County	51	1962	Low	Not Rated
Mill Picayune Watershed Site S-10-2 Harrison County	49	1965	Low	Not Rated
Mill Picayune Watershed Site S-10-7 Harrison County	45	1962	Low	Not Rated
Mill Picayune Watershed Site S-32-1 Harrison County	34	1992	Low	Not Rated
Mill Picayune Watershed Site S-36-1 Harrison County	31	1992	Low	Not Rated
Mill Picayune Watershed Site S-4 Harrison County	29	1991	Low	Not Rated
Mill Picayune Watershed Site S-8-1 Harrison County	30	1985	Low	Not Rated
Mill Picayune Watershed Site S-8-2 Harrison County	48	1984	Low	Not Rated
Mill Picayune Watershed Site S-8-3 Harrison County	34	1965	Low	Not Rated
Mills Dam Marshall County	22	1968	Low	Not Rated
Mines of Spain Wetland Development Dam Dubuque County	11	1996	Low	Not Rated
Mitchell/ Lyon Dam Guthrie County	36	1974	Low	Not Rated
Mitchell Mill Dam Mitchell County	19	1925	Low	Satisfactory

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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.